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For many years botanists of this country, when they have 
wished specimens of Southern plants or have desired to learn 
more about them, have turned by almost common consent to Dr. 
Chas. Mohr, a druggist of Mobile, Alabama, a German by birth. 
An assiduous explorer and collector, an acute observer of plants 
-and a generous correspondent, freely communicating to others 
the results of his labors, Dr. Mohr has won the esteem and 
confidence of all American botanists. Nor is his reputation con- 
fined to this side of the Atlantic, for some of his botanical com- 
munications to the German scientific journals have been trans- 
lated into all the leading languages of Europe. What he has 
accomplished for the science of botany has been done in the 
hours of recreation which he could command in a pretty hard 
struggle for an existence in his calling as pharmacist. During 
the first years of his residence in this country, from 1857 to 1865, 
he devoted the limited hours he could spare for rest or recreation 
to the study of mosses, and the specimens he collected of these 
plants were sent to the leading bryologists of this country and 
Europe. He greatly assisted Lesquereux and James by furnish- 
ing material for their work on the mosses of North America, 
and the many new species which he found were published in 
the BuLterin or THE Torrey Boranicat Cius under the title of © 
“Contributions to the Bryology of the United States.” 
In 1886 Mohr acquired the valuable herbarium of Dr. J. Rid- 
dell, of Louisiana, author of a “ Catalogue of the Plants of Louisi- — 
ana” and of a “Synopsis of the Plants of the West.” This her- 
barium contained the extensive collections of Dr. Josiah Hale, of 
Alexandria, Louisiana, as well as those of Prof. W. M. Carpenter, 
and was to Mohr “a mine of wealth and information.” At about 
the same time he had placed in his hands for determination the — 
valuable collection of Dr. Denney, of Luggsville, La., from which 4 
he got a glimpse of the richness of the arboreal flora of Southert — 
Alabama beyond the pine belt proper. The study of this collec — 
tion inspired him with a special interest in woody plants and ta 
forestry, and his work in this field of botany now stands second 
tonone. The results of a season spent in the field of 1877 form ; 
the chapter on the “Forests of Alabama,” published in 1878 1 
Birney’s Handbook. This paper more systematically arrang 
